but my daughter has no interest in anything, maybe she is afraid of failure. I don't know how to motivate her to learn something. Most little kids of her age are curious to new things, but she isn't. how should I do?

By the way, don't worry too much about /s,z/ pronunciation at age 5. Those are later developing sounds in most kids. It's still common to have difficulty with those sounds until age 7 or so.

Just have fun with your daughter. Don't try to make too much of a lesson out of English study. Read her some fun, easy kids' books in English. Start using more English words and short phrases throughout the day--without requiring her to respond. Just modeling English is useful in the beginning. Even watching English-language cartoons together on TV and commenting on them in English ("Oh look! The dragon is flying! Where's he going...? Ack! Lightning! He better watch out!" etc.) could be useful.